You should look at 'ps -aux' (the '-' is deprecated on some *nix then use 'ps aux') and its output, else if 'ps' does not give all the info you need read up on the proc filesystem.

Here is some code: 
#!/usr/bin/perl
use strict;
use Data::Dumper;
use constant PROG_NAME => 10;

my $what_im_looking_for = 'JVM';
my %ps_hash;
my @ps = `ps aux`;

foreach (@ps) {
    my @tmp = split;
    next if ($tmp[PROG_NAME] ne $what_im_looking_for);
    $ps_hash{$tmp[PROG_NAME]}{cpu}  += $tmp[3];
    $ps_hash{$tmp[PROG_NAME]}{mem}  += $tmp[4];
    $ps_hash{$tmp[PROG_NAME]}{time} += $tmp[9];

}


print Dumper(\%ps_hash);

[download]
Look at the output of 'ps aux' and find what your JVM is listed as in the proc table. Then just stick the name in $what_im_looking_for
Sample ps output: 
USER       PID %CPU %MEM   VSZ  RSS TTY      STAT START   TIME COMMAND
root         1  0.0  0.1  1324   76 ?        S     2001   4:22 init [3
+]
root         2  0.0  0.0     0    0 ?        SW    2001   0:07 [kflush
+d]
root         3  0.0  0.0     0    0 ?        SW    2001   0:12 [kupdat
+e]
root         4  0.0  0.0     0    0 ?        SW    2001   0:00 [kpiod]
root         5  0.0  0.0     0    0 ?        SW    2001   0:25 [kswapd
+]
root         6  0.0  0.0     0    0 ?        SW<   2001   0:00 [mdreco
+veryd]
root        45  0.0  0.0     0    0 ?        SW    2001   0:00 [khubd]
root       353  0.0  0.5  1384  340 ?        S     2001   0:26 syslogd
+ -m 0
root       363  0.0  0.2  1680  184 ?        S     2001   0:01 klogd
                                                               ^^^^^^^
+^^^^^^^
                                                               This is
+ where the name is

[download]


grep 
grep> cd pub
grep> more beer

[download]

In reply to Re: capture cpu and memory usage of JVM using Perl by grep
in thread capture cpu and memory usage of JVM using Perl by Anonymous Monk

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